Anchor



` fln'kes.

- anism illustrated in the accompanying draw- UNITED v STATES PATENT OFFICE.

'HERBERT o.; DUNN, or BALTIMORE, IIIARYLAND;

ANCI-ion.

SPECIFICATION forming part of Letters Patent No. 543,129, dated July 23, 1895. Application filed October I9, 1894. Serial No. 526,380. (No model 1o strain from the axial bolt by an improved form'of the shank-head. I also by improving the shape of 'the anchor-crown make a stock and crown combined, whereby efficiency of the anchor is gained inquick biting of the I attain these new objects by mechings, in which- Figure l is an elevation of the shank A A with a. cylindrical opening D for the pin of 2o the anchor-shank and a cylindrical opening C,-through which passes the axial bolt P1P. The improvement of the shank-head is shown at S, where lthe -wedge-shaped pointed end with two plane faces takes against the inside of thejcrown H H, Figi 4, when the flukes B Bhave revolved to their fullholding angle. Fig. 4, which shows most completely the improvement, is a section of the anchor through X X of Fig'. 3, Fig. 3 being a hori- 3`o zon-tal plan of the anchor. l

In Fig. lawhich fshows the section of the anchor in its holding position, S indicates the pointed wedge-shaped shank-head with one plane face taking against the inside face of the longitudinal opening of the crown. T

shows 'the neck of the shank that takes against t, the inside face opposite, and as thesetwo points of contact are on opposite sides of the axial bolt P P all strain is thus removed from 4o the said bolt when the anchor is being broken out of its holding position in' the ground. The combined crown H H and iukes B B revolve on the axial bolt P P to the same angl'e onthe other side of the longitudinal line 4 5 of the-shank, where similar action takes place 5o ing shoulders a. a, which take againstthe corresponding shoulders at b b, Fig. on the inconnects the crown and shank.

side of the central longitudinal opening in the crown H H. This prevents theshank from pulling out if the axial bolt is lost and also relieves the strain on the axial bolt when the chain pulls on the shank as the cylindrical hole C is made larger than the axial bolt P P.

Fig. 3 shows the combined flukes B B and crown H H with its central longitudinal opening, in which the enlarged shank-head actuates on the axial bolt P P. The combined flukes B B and crown H H turn on the axial bolt P P to about fifty degrees each side of the longitudinal line of shank A A, thus insuring the engagement ofthe flukes whichever 'way the anchor falls. The engagement ot' the Iiukes is further insured by the spread of the flukesB B, and still further by the improved elongated shape of the crown, the projections F F performing the functions of a stock in combination with the crown. This new improvement compels the anchor to assume a horizontal position on striking bottom and quick biting of the iiukes immediately follows.

Fig. 5 is a View ofthe anchor from the crown, showing the central longitudinal opening in which the shank is inserted; also the stockshaped crown and the axial bolt P P, which Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is- A 1. In. an anchor having two spread tlukes integralwith an elongated crown piece containing a central longitudinal opening contracted on the linke side; an enlarged headed .shank with a wedge shaped point having two plane bearing faces forming an acute angle at end of shank head, one face of which bears against the inside of central longitudinal opening of crown while neck of shank takes against the other side to relieve bolt strains, said shank head actuating in longitudinal crown opening andcontaining a transverse cylindrical opening in combination with an axial bolt passing transversely through both shank head and crown piece allowingfiukes to actuate each side of shank substantially as specified. n

2. In an anchor having a locking shank head with a wedge shaped pointl having two TOO plane bearing surfaces, actuating in a central longitudinal opening,r of crown piece by means of an axial holt passing transversely through crown piece and cylindrical opening of shank head; an elongated crown, integral with two spread lukes, having transverse projections in plane of lukes performing the functions of a stock, the lukes actuating on each side of shank in 'coi'nbination with axial boit suhstantially as specified.

Signed at Baltimoreg in the State of Maryland, this 2lst day of September, 1894:.

H. O. DUNN, Witnesses:

SAMUEL REBER, JNO. R. KING. 

